OPAMP Help needed

[amdie]

I am using a sharp GP2d12 IR sensor with a 4.8 V battery and trying to power a vibration motor. The motor requires a 80 mA current to start and has an operationg range of 2 -3.6 V. Unfortunately the sensor only supplies 5mA and ranges in voltage from .5-2.6 V. What OPAMP or other device can I use to get this motor to vibrate harder, the closer the object is to the sensor?

 

[Roff]

Rotary vibration motors have an eccentric weight attached to the shaft. The only parameter you can change is the frequency of vibration, not the intensity. Is that what you want?

 

[IQBALSOUND]

I think that any conventional Power amp basically of an OP-Amp (LF351 not sure check data sheet)and couple of transistors can help you out if not post complete detail may be i can reply helpful.

 

[audioguru]

Sure you can change the intensity of a vibrator.
Vibrators have a variable resistance in series which can increase the power to the motor enough to vibrate her socks off!
Then the frequency (the RPM of the motor) also increases.